Find the integral of $4\cdot \left(\frac{3}{8}\right)-2\cdot \left(\frac{5}{6}\right)+7\cdot \left(\frac{7}{12}\right)-3\cdot \left(\frac{1}{3}\right)$

Compute the integral

$\int xdx$

Compute the integral

$\int\left(x\cdot\cos\left(2x^2+3\right)\right)dx$

Compute the integral

$\int x\left(x^2-3\right)dx$

Compute the integral

$\int x^2\sin\left(x\right)dx$

Compute the integral

$\int x^2\cos\left(2x\right)dx$

Compute the integral

$\int x^2\ln\left(x\right)dx$

Compute the integral

$\int\left(\frac{x}{2}+3\right)^2dx$